Learn Hardcore German: Wenn es regnet, trage ich meine Regenjacke.

Because wenn introduces a subordinate clause (Nebensatz) in German. In Nebensätze the finite verb always moves to the very end. So you get Wenn es regnet rather than Wenn es regnet … in the main-clause order.

Why is there a comma between Wenn es regnet and trage ich meine Regenjacke?

German requires a comma to separate a subordinate clause from its main clause. Since Wenn es regnet is a Nebensatz, you must put a comma before you continue with the Hauptsatz.

Why does the main clause start with trage rather than ich?

In a German main clause the finite verb must be in the second position. Here the entire subordinate clause Wenn es regnet counts as the first “position.” That forces the verb trage into the next slot, so it appears before the subject ich.

Can we add dann into the sentence, like Wenn es regnet, dann trage ich meine Regenjacke?

Yes, you can. Dann (then) is optional and often used for emphasis or to mirror English patterns. Native speakers often omit it because wenn already implies “then.”

Why is the dummy subject es necessary in es regnet?

German grammar requires every clause to have a subject. Weather verbs like regnen, schneien, donnert etc. cannot act on a real noun, so German uses the dummy pronoun es—just like English uses “it” in “It’s raining.”

Why use wenn and not falls in this sentence?

Wenn expresses a general or habitual condition (“whenever/when”). Falls means “in case” or “if” in the sense of a more remote or uncertain possibility. Here you speak of your normal routine whenever it rains, so wenn is the natural choice.

Can I use the separable verb anziehen instead of tragen?

Yes. anziehen means “to put on.” If you want to stress the action of donning the jacket you say Wenn es regnet, ziehe ich meine Regenjacke an. tragen simply means “to wear” or “carry,” so trage ich focuses on wearing rather than the act of putting it on.

Why is Regenjacke capitalized, and how is the word formed?

All German nouns are capitalized. Regenjacke is a compound noun made of Regen (rain) + Jacke (jacket). German loves to stick nouns together to form precise meanings.

Why do we say meine Regenjacke instead of die Regenjacke?

meine is a possessive pronoun (“my”), showing that the jacket belongs to you. die Regenjacke (the rain-jacket) is a definite article and would be used if you and your listener already know which jacket you mean.

Could I express this in the future tense?

Absolutely—for a specific future event you could say Wenn es regnet, werde ich meine Regenjacke tragen. However, German often uses the present tense to refer to scheduled or automatic future actions, so the simple present (trage ich) is perfectly natural.